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Fabrication parameters for optimized thermoelectric Mg2Si

de Boor, Johannes and Compere, Camille and Dasgupta, Titas and Stiewe, Christian and Kolb, Hendrik and Schmitz, Andreas and Müller, Eckhard (2014) Fabrication parameters for optimized thermoelectric Mg2Si. Journal of Materials Science, 49 (8), pp. 3196-3204. Springer. DOI: 10.1007/s10853-014-8023-8 ISSN 0022-2461

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Abstract

Here, we report on the effect of sintering temperature, particle size, and sintering pressure on the thermoelectric properties of Sb-doped Mg2Si samples. We find a strong dependence of thermoelectric performance on sintering temperature with the best properties achieved at 900 °C. We furthermore show a strong influence of the particle size of the employed powder, with coarser powder giving better properties. The difference stems mainly from the electrical conductivity; Seebeck coefficient and thermal conductivity are affected to a lesser extent. With respect to sintering pressure, a small positive influence of increasing pressure is found. We obtain a peak thermoelectric figure of merit of 0.75 ± 0.18 at 820 K employing optimized fabrication parameters.

Item URL in elib:https://elib.dlr.de/92498/
Document Type:Article
Title:Fabrication parameters for optimized thermoelectric Mg2Si
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de Boor, JohannesGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Compere, CamilleGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Dasgupta, TitasGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Stiewe, ChristianGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Kolb, HendrikGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Schmitz, AndreasGerman Aerospace Center, Institute of Materials Research, Köln, GermanyUNSPECIFIED
Müller, EckhardGerman Aerospace Center, Institute of Materials Research, Köln, Germany and Justus Liebig University Giessen, Institute of Inorganic and Analytical Chemistry, 35392 Giessen, GermanyUNSPECIFIED
Date:17 January 2014
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:49
DOI :10.1007/s10853-014-8023-8
Page Range:pp. 3196-3204
Publisher:Springer
ISSN:0022-2461
Status:Published
Keywords:magnesium silicides, thermoelectric materiels, measurement, Seebeck, figure of merit
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Fahrzeugenergiesystem III (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Thermoelectric Materials and Systems
Deposited By: Zabrocki, Dr. Knud
Deposited On:25 Nov 2014 10:39
Last Modified:06 Sep 2019 15:27

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